<ul><li>This guide explains configuring Fluentd to extract structured data from unstructured log messages using the parser plugin with a regular expression (regexp).</li><li>If you need to extract specific fields, such as log_source and index, from a log message, you can do this as follows.</li><li>If you need to extract fields such as timestamp, level, module, and message from logs with timestamps, you can do this as follows.</li><li>If you need to extract key-value pairs from a log message, you can do this as follows.</li></ul>

Fluentd: How to Use a Parser With Regular Expression (regexp)

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